Premium material: The automatic fish feeder is made of premium plastic material, durable and long lasting. Two fixing methods: one installation is fixed clip installation (for open type aquarium without cover), and the other is a strap installation attachment (for closed type aquarium with lid). Two feeding options: choose automatic feeding of your fish at a scheduled time (once or twice a day ) for 12h/24h, there is also manual feeding option, pressing ;manual feeding will not change the automatic feeding mode. Two feeding containers: There are two sizes of food box to adjust quantity;feed, 210ml large capacity food box, can hold 100g fish food; small food box; a capacity of 100ml, can hold 50g of fish food. Suitable for a variety of foods: suitable for most types of foods, such as flakes, strips, pellets, gradients, etc. Control the amount of fish food: you can adjust the slider to increase or decrease the quantity of food dispensed per round, there are 6 levels of adjustment.